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| Design and Efficiency of Photovoltaic-Thermoelectric Power Generator with Negative Feedback Characteristic |
| YANG Jing-Jing-1, LIU Yong-Sheng-1, FANG Wen-Jian-1, FANG Jin-1, PENG Lin-1, YANG Zheng-Long-2, GAO Tian-1, GU Min-An-1 |
| (1.Institute of Solar Energy, Shanghai University of Electric Power, Shanghai 200090, China;2.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 200092, China) |
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Abstract The output power of solar cell decreases with the increase of temperature, while the output power of semiconductor thermoelectric power generation module increases with the increase of temperature difference. Based on their output power vs. temperature relationship mentioned above, an optimal system of photovoltaicthermoelectric power generation was designed by using chimney effect, which possesses a negative feedback characteristic. By analysis, it can be seen that the out power adds 4.3W by using thermoelectric module, and photovoltaic cell power increases 6.9% in the system. This method can raise energy efficiency to 12.06%, which is higher 1.42% than that by natural cooling method. Moreover, the system reduces emissions of NOx 9.7 kg, CO2 742.9 kg, SO2 9.6 kg during the apparatus lifecycle. At the same time, this system maintains temperature difference at 22 ℃ between photovoltaic cells and environment, which increases the solar cells life span.
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Received: 13 June 2012
Published: 28 April 2013
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